DOWN LOW- a secret underground organization where straight, masculine, "thug like" black men, often with wives and girlfriends secretly have unprotected sex with other black men- also known as "the DL".

#1: "Yo bro, where were you last night"?
#2: "Not with mah girl- i was layin it up on the DL".

The Urban Dictionary Mug

DOWN LOW see also D low--Hidden, concealed,secret.Specifically used to refer to covert male homosexual activity.Whether we're talking about guys who freak with their boys, or hustlers who are strictly "gay for pay" Thanks to homophobia, bigotry and all that bullshit in their communities they prefer to keep things quiet: On the DL.

"It's hard to stay on the DL when your girl catches you on the THUGZILLA web site at 3 o'clock in the morning"